Internet suspended?

On Friday Sept.24th at 5pm my internet was turned off, I had know idea what happend cause I was in the middle of sending files to my job, so I did some trouble shooting and came to the conclusion that my internet provider had somthing to do with it.

I called them (my internet provider) and told them my internet connection was not working and they told me my account has been suspended with know explanation except to call Monday.

I call Monday Sept.27th and they have no clue as to what happend and pretty much denied that my account was suspended they also "maybe" I was running multiple servers and was reported, BULLSHIT I told them and they have no explanation, so they decide to run some tests but they can't since my modem is not turned on since im at work right now.

Is there somthing I can do to get some credit or sue thier ass ?

Anything happend like this to any one else? Or any advice would be helpful.